TY - GEN AU - Rothman, Kenneth AU - Lash, Timothy L. TI - Modern epidemiology SN - 9780781755641 U1 - 614.4 PY - 2008/// CY - Philadelphia PB - Wolters Kluwer, Lippincott Williams & Wilkins KW - EPIDEMIOLOGY-RESEARCH KW - EPIDEMIOLOGY-STATISTICAL METHODS KW - EPIDEMIOLOGY UR - WW.COM ER -